Tool member cover and cover deployment device
A surgical instrument including a tool member cover and a cover deployment device are disclosed. The cover is supported adjacent to or on the tool assembly of the surgical instrument and is movable from a first position in which the tool assembly is uncovered to a second position in which the tool assembly is at least partially encompassed by the cover. The deployment device is provided for moving the cover from the first position to the second position.
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This present application claims the benefit of and priority to International application Ser. No. PCT/US2003/024201 filed on Jul. 31, 2003, which, in turn, claims the benefit of and priority to U.S. Provisional Application Ser. No. 60/400,328, filed on Jul. 31, 2002, the entire contents of which are incorporated herein by reference.
BACKGROUND1. Technical Field
This application relates to a cover and cover deployment device for the tool member or tool assembly of a surgical instrument, and more particularly, to a cover and cover deployment device for the tool member of a laparoscopic or endoscopic surgical instrument for manipulating, treating or excising tissue, especially diseased or cancerous tissue, from a body cavity.
2. Background of Related Art
A variety of different types of surgical instruments have been developed for manipulating, identifying, treating, repairing and/or excising tissue including organs or portions thereof located within body cavities such instruments sometimes being hereafter referred to as surgical instruments for treatment of body tissues. These instruments include graspers, fasteners, e.g., staplers, dissectors, biopsy devices, coagulators, etc. Typically, these instruments are dimensioned to be used in both open and laparoscopic or endoscopic procedures.
In endoscopic surgical procedures for treatment of body tissue, a surgical instrument is inserted through an incision or cannula to a position adjacent the tissue to be treated. The distal tool member of the instrument is then manipulated to treat, i.e., biopsy, excise, dissect, coagulate, reposition, etc., the tissue. Thereafter, the instrument with or without excised tissue is withdrawn from the surgical site through the incision to remove the instrument from the body cavity.
One problem associated with current surgical devices is that during removal of the tool member from the surgical site, the tool member or tool assembly (hereafter, for simplicity “tool member”) of the surgical instrument for treating, for example, diseased, tissue comes into contact with the healthy tissue defining the incision and/or within the body cavity in which the surgical site is located. This may also be a problem in open surgical procedures. Where the tissue being treated is diseased tissue, e.g., cancerous, this problem becomes critical since contact between the cancerous tissue and the healthy tissue may result in seeding of cancerous cells resulting in metastases.
Accordingly, a need exists in the art for improved instrumentation for shielding healthy tissue from diseased tissue during removal of a surgical instrument from a surgical site.
SUMMARYThe present disclosure provides a tool member cover for use with a surgical instrument having a tool assembly and a body portion. The cover is preferably tubular and has open distal and proximal ends. A portion of the cover, preferably the distal end, is fastened to the surgical instrument adjacent to or on the tool assembly. Alternately, the cover may be removably attached to the surgical instrument. The cover is movable from a first position in which the tool member is uncovered to a second position in which the cover at least partially encompasses the tool member.
Preferably, the cover is formed of an impermeable material. A deployment device is provided for moving the cover from the first position to the second position. In a first embodiment, the deployment device includes a sleeve formed of half-sections which are held together using expandable members, e.g., resilient O-rings. The O-rings allow the sleeve half-sections to move outwardly relative to each other to allow the sleeve to pass over a tool assembly having a larger diameter than a body portion of the surgical instrument. The sleeve is slidably positioned about the body of a surgical instrument between retracted and advanced positions to move the cover from the first position to the second position. The cover is positioned about the body portion of the surgical instrument and about the deployment device such that when the deployment device is moved from the retracted to the advanced position, the distal end of the sleeve engages the distal end of the cover to invert the cover over the tool assembly.
The cover may include a closure device such as a drawstring or elastic band to close the distal end of the cover to enclose the tool member within the cover. The cover may be used with a variety of different types of surgical instruments including staplers, fasteners, manipulators, biopsy devices, retractors, coagulators, dissectors etc.
Various preferred embodiments of the presently disclosed tool member cover and cover deployment device are described herein with reference to the drawings, wherein:
Preferred embodiments of the presently disclosed tool member cover and cover deployment device will now be described in detail with reference to the drawings in which like reference numerals designate identical or corresponding elements in each of the several views.
Referring also to
Referring to
Referring to
Referring also to
It is understood that cover 10 can be secured at any suitable location along shaft 58, although on some instruments securing it close to or even on the tool member itself will save cover material and will render the cover easier to manipulate with or without tissue therein.
Referring to
The distal end 110a of cover 110 is secured to surgical instrument 111 adjacent to or on a proximal portion of tool assembly 152 in the manner described above with respect to cover 10, such that cover 110 is positioned about deployment device 116 and body 158 of surgical instrument 111. Engagement member 126 is positioned slightly proximally of a fastening point 160 of cover 110 and to tool assembly 152. In use, deployment device 116 is advanced about body 158 of surgical instrument 111 by pushing on guide portion 124 to advance engagement member 126 into the distal end of cover 110 to invert cover 110 about tool assembly 152 in a manner similar to that disclosed above. Because engagement member 126 is flexible, it is able to slide over the increasing diameter of tool assembly 152. After cover 110 is fully deployed (not shown), deployment device 116 can be retracted and surgical instrument 111 can be removed from a surgical site.
It is to be noted that the distal end 110a of cover 110 can be secured to tool assembly 152 or a similar or like operating end to end anastomosis device that does not require holes such as “H” (
While the invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various modifications and changes in form and detail may be made therein without departing from the scope and spirit of the invention. For example, a closure device other than an elastic band may be provided to close the cover about the tool assembly. For example, a drawstring “D” (
Claims
1. A surgical instrument comprising:
- a body portion;
- a tool assembly supported on the distal end of the body portion;
- an elongated cover supported about the body portion of the instrument, the elongated cover being formed from a collapsible material and having a substantially tubular configuration having open proximal and distal ends, the elongated cover being movable about the body portion of the instrument from a first position located proximally of the tool assembly to a second position at least partially encompassing the tool assembly, wherein when the elongated cover is in the first position the distal end of the elongated cover is secured to the instrument adjacent to the tool assembly such that the elongated cover can be inverted about the tool assembly as the elongated cover is moved from the first position to the second position; and
- a cover deployment device at least partially disposed about the body portion between the body portion and the elongated cover when the elongated cover is in the first position, the cover deployment device being in releasable engagement with the cover and being advanceable along the body portion to move the cover from the first position to the second position.
2. A surgical instrument according to claim 1, wherein the cover is liquid impermeable.
3. A surgical instrument according to claim 1, wherein the cover deployment device includes a sleeve slidably positioned about the body portion between a retracted and an advanced position, the sleeve being slidable from the retracted position to the advanced position to move the cover from the first position to the second position.
4. A surgical instrument according to claim 3, wherein the sleeve includes first and second half-sections, the first and second half-sections being urged into abutment with one another by at least one expandable member, the expandable member being expandable to permit the first and second half-sections to move outwardly with respect to each other.
5. A surgical instrument according to claim 4, wherein the expandable member is a resilient O-ring.
6. A surgical instrument according to claim 4, wherein the sleeve includes a proximally located annular ring dimensioned to facilitate movement of the sleeve between the retracted and advanced positions.
7. A surgical instrument according to claim 4, wherein the first sleeve half-section includes at least one projection and the second sleeve half-section includes at least one slot, the at least one projection being slidable into the at least one slot to maintain alignment between the first and second half-sections when the half-sections move outwardly with respect to each other.
8. A surgical instrument according to claim 1, wherein the cover defines a lumen and the cover is positioned about the body portion and the cover deployment device, wherein movement of the cover deployment device from the retracted position to the advanced position inverts the cover over the tool assembly.
9. A surgical instrument according to claim 8, wherein the cover deployment device includes a distal engagement member, a proximal guide portion and a central body portion interconnecting the engagement member and the guide portion, the cover deployment device being slidably supported on the body portion to enable the cover deployment device to be moved to move the cover to the second position.
10. A surgical instrument according to claim 1, wherein the cover defines a lumen, the proximal end of the cover being movable over the tool assembly to at least partially encompass the tool assembly.
11. A surgical instrument according to claim 10, further including a closure device for closing the proximal end of the cover after it has moved over the tool assembly.
12. A surgical instrument according to claim 11, wherein the closure device includes an elastic band supported by the cover.
13. A surgical instrument according to claim 11, wherein the closure device includes a drawstring.
14. A surgical instrument according to claim 13, wherein the distal end of the cover is removably fastened to the surgical instrument.
15. A surgical instrument according to claim 14, wherein the surgical instrument is a circular stapler.
16. A surgical instrument according to claim 14, wherein the surgical instrument is an ultrasonic dissector.
17. A surgical instrument according to claim 14, wherein surgical instrument is a linear stapler.
18. A method of performing a surgical procedure comprising the following steps:
- providing a surgical instrument including a body portion, a tool assembly, a cover deployment device and a cover, the distal end of the cover being secured about the instrument adjacent a proximal end of the tool assembly, the cover deployment device being positioned on the body portion and the cover being positioned about the cover deployment device such that the cover is movable from a first position wherein the tool assembly is uncovered to a second position wherein the tool assembly is at least partially covered by advancing the cover deployment device along the body portion;
- positioning the surgical instrument adjacent a surgical site and performing a surgical operation on desired tissue;
- moving the cover from the first position to the second position by advancing the cover deployment device to invert the cover at least partially over the tool assembly; and
- subsequently removing the surgical instrument from the surgical site, while maintaining the cover at least partially over the tool assembly.
19. A method according to claim 18, wherein the surgical instrument is a circular stapler.
20. A method according to claim 18, wherein the surgical instrument is a linear stapler.
21. A method according to claim 18, wherein the surgical instrument is an ultrasonic dissector.
22. A method according to claim 18, wherein the surgical instrument includes a closure device, and further including the step of actuating the closure device to close the cover at a location distally of the tool assembly.
23. A method according to claim 22, wherein the closure device is a drawstring.
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Type: Grant
Filed: Jul 31, 2003
Date of Patent: Nov 12, 2013
Patent Publication Number: 20050236459
Assignee: Covidien LP (Mansfield, MA)
Inventor: Richard D. Gresham (Guilford, CT)
Primary Examiner: Thomas McEvoy
Application Number: 10/522,914
International Classification: A61B 17/08 (20060101); A61D 1/00 (20060101);